Frequently Asked Questions

What is the difference between a Grease Guardian and a Grease Trap?

Both are mechanisms for removing fats, oils and grease (FOGs) as well as solids from contaminated waste water to:
A) Prevent them from solidifying in downstream sewers to cause blockages and
B) Reduce the level of treatment required at water-treatment plants to break down the FOGs.

GREASE TRAP - A grease trap/pit/arrestor is a passive device with no moving parts, typically manufactured in concrete or fibreglass with a minimum volume around 1000 litres. It relies onretention time and cooling to trap solids and grease within it. As the solids and grease must necessarily build up inside the trap, its efficiency in retaining this material reduces over time and it must be pumped out and manually cleaned on a regular frequency.
Due to its size, a grease trap is normally installed underground, but can also be installed above ground. Grease traps are installed external to a kitchen. Grease traps can be a source of unpleasant odours as the FOGs caught within it rot over time.

GREASE GUARDIAN - The Grease Guardian is a compact, above-ground device that automatically removes trapped oil and grease near the source. Its performance can be monitored by the hour and it never needs to be pumped out. Its FOG separation efficiency has been measured in a variety of circumstances as 96-97%.
Due to its compact size and self cleaning mechanism, the Grease Guardian can be installed within a kitchen, close to the source of grease, but can also be installed outside if drainage dictates.

Some of the problems experienced with grease traps include:

  • Pipe blockages by congealed FOGs, especially during cold weather
  • Frequent pump-out costs   
  • Emission of foul odours
  • Attraction to vermin   
  • Erosion of the structure (usually concrete) by acidic FOGs leading to fractures and leaking.

If any of these points listed above is causing your business a  problem, it's time to consider the Grease Guardian.

What are the benefits of a Grease Guardian?

Grease Guardian is a compact, above-ground device whose performance can be monitored by the hour and which never needs to be pumped out. Its FOG separation efficiency has been measured in a variety of circumstances as 96-97%

Grease Guardian is an under-flow device, having baffles and a chamber in much the same arrangement as in a grease trap. However, it also has an active skimming device which daily removes the FOGs from the system and transfers them to a convenient, hand-carried container.

Because it does not need to accommodate the accumulated FOGs for several weeks between pump-outs, Grease Guardian’s tank capacity is less than 40 litres! Grease Guardian is manufactured in AISI304 stainless steel and is therefore extremely hygienic. It is available with IP66 rating which means that it can be washed down by water jets.

Grease Guardian does have a working mechanism but, typically, this operates for only a short period or periods during the day and is so simple that it is not prone to breakdowns. However, if there should be a failure and the unit fails to operate when programmed it gives a visible and an audible signal to the operator of the business. It then continues to operate as static FOG separator until a service technician repairs the problem so that the captured FOGs can then be skimmed off.

Cold weather is not a problem for Grease Guardian. Each unit is equipped with a small, programmable electric heater which is set according to the conditions of each location to keep the FOGs from solidifying and causing blockages. Grease Guardian has an in-built solids screening basket to prevent the build up of solids in the base of the tank. The basket is easily emptied, a recommended daily procedure.

Grease Guardian is delivered in a box and is easily installed by a Plumber, typically under a sink or within the support stand of a combi oven. It requires no water supply and it operates on single phase electrical power.
Grease Guardian may be purchased or leased by the operator as an asset of their business and can be depreciated appropriately against tax. It can also therefore be sold as an asset with the business or if the business relocates, the Grease Guardian goes with it.

When should a Grease Guardian be installed?

In addition to the problems listed above, some businesses are operating without grease traps, while others are operating with existing grease traps that may be undersized or overloaded.

These businesses may be required by their local approval authority, or simply for practical purposes (to reduce pump-outs / pipe clogging /smells) to upgrade their grease interception facilities. They may be faced with one or more of the following difficulties when planning to install or upgrade a traditional grease trap:

1The civil works involved in building a new or bigger grease trap cannot be carried out while the business is operating. (Loss of income)


2The building may not have the space necessary for a new grease trap without sacrificing other functions such as car parking.


3The building may not grant suitable access for the pump-out process.


4The building’s owner (as opposed to the business operator) may not be willing to allow the civil works to be carried out.


5The building may be the subject of an historical preservation order.


6The business operator may raise objections to paying for a permanent facility to be added to a building he or she is only renting.


7The cost of the civil works may be exorbitant relative to the actual or potential income of the business.


If any of these points is causing your business a headache, the Grease Guardian may be able to help.

So what is the best choice for my business?

  • If an existing grease trap is too small and/or overloaded a Grease Guardian can be installed upstream of the grease trap to augment its capacity.
  • If you have constant pipe clogging problems between the kitchen and an existing trap, a Grease Guardian can be installed near the source within the kitchen and remove the FOGs before they hit the trap, solving existing line clogging problems.
  • If there is no grease trap and one cannot be installed because of space or access issues, it may be possible (dependent upon local authority area) to install a Grease Guardian as a stand-alone solution
  • Certain businesses, such as those that barbecue chickens in bulk are already required by some major Water Authorities to install a grease separator device such as the Grease Guardian upstream from any grease trap.

Read more in the Sydney Water newsletter here.

Does Grease Guardian carry a warranty?

Absolutely! The standard warranty is one year but we can also offer:

  • 3 Years warranty on parts
  • 10 years warranty on the stainless steel tank

What does a Grease Guardian cost?

Grease Guardian pricing starts at less than $6,000 plus GST whereas it is not uncommon for the installation of a grease trap to cost $20,000 or more and since Grease Guardian qualifies as a business asset it can be leased – with no capital outlay– for as little as A$3.00 per day.

Eco Guardians will be pleased to arrange for the leasing company to contact you. The documentation is simple and the process takes very little time.

What should I do next?

Eco Guardians has many years of experience in this field and shares with Water Authorities their goal of cleaning up our waterways by dealing with trade waste issues at source. We invite you to discuss your needs with us so that we can work with you and your local Water Authority to ensure that your business acquires an effective, economical and environmentally sustainable solution to its waste water treatment.

Click on the contact tab above to get in touch with us if you'd like more information about the Grease Guardian or visit our online shop to place your Grease Guardian order to have it delivered directly to your business.

Grease Guardian in Action

Why Choose Grease Guardian?

Grease Guardian CloseupGrease GuardianThousands of Grease Guardians are in use all over the world (900 of them in Australia), intercepting kitchen wastewater, skimming the oils and fats from it for safe, sustainable disposal and then passing the cleansed water downstream to grease traps or to sewers.

    The benefits are clear:

  • A major reduction of pollutants in sewers
  • Reduced loading of grease traps and the possibility of reduced pump-out frequency
  • Fewer drain blockages, giving both cost and hygiene benefits

Grease GuardianWSAA (Water Services Association of Australia) states in its Product Appraisal Report No TWA1008 that "It is recommended that WSAA Members and Associates accept or authorise the Grease Guardian product range for use in sewer networks..."

Eco Guardians is proud to report that a national supermarket chain has recently contracted to use the Grease Guardian until 2014, continuing a relationship that has existed for more than 12 years already. If your food business is handicapped by having a too-small grease trap (or none at all), please be sure to read the Frequently Asked Questions above to see how the Grease Guardian may be able to benefit you.

There is a range of models to suit food businesses from 10 covers to hundreds of seats. 

A Grease Guardian can deliver all the above benefits without construction costs and in almost no time at all. Eco Guardians are more than happy to help you obtain Water Authority approval as well.

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Click here to visit the Grease Guardian manufacturers page for more product details.
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